I understand that there is a certain stylistic flair to using non-lining numerals with old style caps on title pages and in other decorative settings. However, it seems to me that small-cap heigh lining numerals are far more useful as part of the sc set/selection; 9 times out of 10, those will be what a typesetter wants when he or she is setting small cap text.
The most ironic part is that a few of these faces HAVE such numerals in the font, but just not assigned to the small cap set!
I assume I am missing something and everybody else in the world works very differently than I or any of the typesetters and designers I know. That's the only explanation I can come up with.